after failing a new connection, flush the onion descriptor cache and try again in case the destination has cycled since its last use

utils/networkresolver.go

@@ -4,6 +4,7 @@ import (
 	"golang.org/x/net/proxy"
 	"net"
 	"strings"
+	"github.com/yawning/bulb"
 )
 
 const (
@@ -53,8 +54,26 @@ func (nr *NetworkResolver) Resolve(hostname string) (net.Conn, string, error) {
 
 	conn, err := torDialer.Dial("tcp", resolvedHostname+".onion:9878")
 	if err != nil {
-		return nil, "", CannotDialRicochetAddressError
+		NewNym("127.0.0.1:9051", "tcp4", "", 9878)
+
+		return nil, "", err
 	}
 
 	return conn, resolvedHostname, nil
 }
+
+// runs SIGNAL NEWNYM on the tor control port to flush the onion descriptors cache
+func NewNym(torControlAddress string, torControlSocketType string, authentication string, onionport uint16) error {
+	c, err := bulb.Dial(torControlSocketType, torControlAddress)
+	if err != nil {
+		return err
+	}
+
+	err = c.Authenticate(authentication)
+	if err != nil {
+		return err
+	}
+
+	_, err = c.Request("SIGNAL NEWNYM")
+	return err
+}